Navy dye mixtures and their use in dyeing polyesters

ABSTRACT

Dye mixtures containing dyes of the formula I ##STR1## where X is hydrogen, chlorine or bromine, 
     R 1  is hydrogen, methoxy, ethoxy or phenoxy, 
     R 2  is hydrogen, methyl, ethyl, n-propyl or i-propyl and 
     R is ##STR2## where R 3  is C 1  -C 5  -alkyl, allyl, methallyl, crotonyl, prenyl or benzyl, 
     R 4  is unsubstituted or phenyl- or phenoxy-substituted straight-chain or branched C 1  -C 8  -alkyl which may be interrupted by 1, 2 or 3 0 atoms, or is C 3  -C 5  -alkenyl, unsubstituted or chlorine-, bromine-, C 1  -C 4  -alkyl- or C 1  -C 4  -alkoxy-substituted phenyl or benzyl, 
     the mixtures containing not less than 40% of dyes 
     wherein R is ##STR3## or NHC 2  H 4  CN, from 0 to 20% of one or more dyes wherein R is ##STR4## and from 10 to 60% of one or more dyes wherein R is ##STR5##

The present invention relates to dye mixtures, containing dyes of the formula I ##STR6## where X is hydrogen, chlorine or bromine,

R¹ is hydrogen, methoxy, ethoxy or phenoxy,

R² is hydrogen, methyl, ethyl, n-propyl or i-propyl and

R is ##STR7## where R³ is C₁ -C₅ -alkyl, allyl, methallyl, crotonyl, prenyl or benzyl,

R⁴ is unsubstituted or phenyl- or phenoxy-substituted straight-chain or branched C₁ -C₈ -alkyl which may be interrupted by 1, 2 or 3 O atoms, or is C₃ -C₅ -alkenyl, unsubstituted or chlorine-, bromine-, C₁ -C₄ -alkyl- or C₁ -C₄ -alkoxy-substituted phenyl or benzyl,

the mixtures containing not less than 40% of dyes wherein R is ##STR8## or NHC₂ H₄ CN, from 0 to 20% of one or more dyes wherein R is ##STR9## and from 10 to 60% of one or more dyes wherein R is ##STR10##

The dye mixtures may be prepared by mixing the individual components mechanically, or by carrying out a mixed coupling reaction. Details of the method of preparation may be found in the Examples, where parts and percentages are by weight, unless stated otherwise.

The novel dye mixtures are distinguished by excellent tinctorial properties, in particular by essentially temperature-independent uptake, good bath exhaustion, good build-up, so that very deep colors can be achieved, and very high tinctorial strength. The fastness characteristics of the dyeings substantially correspond to those of the individual components.

Preferred mixtures contain

(a) from 10 to 75% of dyes of the formula I, wherein R is ##STR11##

(b) from 0 to 75% of dyes of the formula I, wherein R is ##STR12##

(c) from 10 to 60% of dyes of the formula I, wherein R is ##STR13##

(d) from 0 to 20% of dyes of the formula I, wherein R is ##STR14## R⁵ being C₁ -C₅ -alkyl or allyl, components (a) and (b) jointly accounting for not less than 40% of the mixture.

Dye mixtures of particular industrial importance contain dyes of the formula II ##STR15## where X and R¹ have the stated meanings, the mixture consisting of from 40 to 85% of one or more dye pairs of the formula II, wherein R is ##STR16## whilst X and R¹ have the same meanings for each member of the pair, from 0 to 20% of dyes of the formula II, wherein R is ##STR17## and from 15 to 60% of dyes of the formula II, wherein R is ##STR18##

The dye mixtures may, due to the method of synthesis, contain yet further minor components; in particular, the dyes of the formulae I and II, wherein R is ##STR19## as a rule contain small amounts of the isomeric dyes of the formulae I and II, respectively, wherein R is ##STR20## this does not affect the results.

EXAMPLE 1

(a) 262 parts of 6-bromo-2,4-dinitroaniline are introduced into 2,000 parts of concentrated sulfuric acid. 320 parts of nitrosylsulfuric acid (containing 11.5% of N₂ O₃) are run in slowly at 5°-15° C., whilst stirring and cooling the mixture, and stirring is then continued at 10°-15° C. for not less than 3 hours.

(b) 301 parts of 2-[N-3'-methyl-but-2'-enyl-N-β-cyanoethyl-amino]-4-acetanisidine are dissolved in 450 parts of warm acetic acid and the solution is added to a mixture of 2,000 parts of water, 300 parts by volume of concentrated hydrochloric acid, 10 parts of amidosulfonic acid and 10 parts of a diisobutylnaphthalene-1-sulfonic acid mixture (isomers in respect of the position of the isobutyl groups). 4,000 parts of ice are added and the diazonium salt solution prepared under (a) is run in slowly at from -5° to +3° C., with thorough stirring. The reaction is completed by adding sodium acetate or sodium formate until the pH is 3. The dye obtained is filtered off at room temperature or above, washed neutral and salt-free with water, and dried. About 520 parts of a violet-black powder of the formula ##STR21## are obtained; this product gives blue dyeings, having good lightfastness, washfastness and fastness to thermofixing and perspiration, on polyester fibers. However, the build-up of the dye is poor, and the depth of color is very dependent on the temperature in the dyebath in the range from 120° to 140° C.

(c) Using a method similar to Example 1(b), 233 parts of 2-(N-β-cyanoethyl-amino)-4-acetanisidine give 460 parts of the dye of the formula ##STR22## which gives bluish violet dyeings on polyester fibers, the depth of color being poor.

(d) Using a method similar to Example 1(b), 236 parts of 2-diethylamino-4-acetanisidine give 365 parts of the dye of the formula ##STR23## which produces greenish blue hues on polyester fibers.

(e) Using a method similar to Example 1(b), 310 parts of 2-(3'-n-butoxy-2'-hydroxy-propyl-amino)-4-acetanisidine give about 510 parts of the dye of the formula ##STR24## which produces greenish navy hues on polyester fibers.

(f) A polyester fabric is dyed by the HT method, using a dye mixture which consists of 20 parts of the dye prepared under 1(b), 40 parts of the dye prepared under 1(c), 10 parts of the dye prepared under 1(d) and 30 parts of the dye prepared under 1(e). Advantageously, the dye mixture is employed as a finely dispersed formulation containing a dispersant.

Deep and level navy dyeings with good fastness characteristics are obtained. Within the HT range of 125°-135° C., the depth of color is only slightly temperature-dependent. Even when used for deep navy dyeings, the dye mixture shows good bath exhaustion and good build-up.

EXAMPLE 2

262 parts of 6-bromo-2,4-dinitro-aniline are diazotized as described under 1 (a) and the product is coupled, similarly to 1 (b), with a mixture of 56.7 parts of 2-[N-3'-methyl-but-2'-enyl-N-β-cyanoethyl-amino]-4-acetanisidine, 99.6 parts of 2-(N-β-cyanoethyl-amino)-4-acetanisidine, 25.1 parts of 2-diethylamino-4-acetanisidine and 86.2 parts of 2-(3'-n-butoxy-2'-hydroxy-propylamino)-4-acetanisidine.

A mixed dye, which corresponds, in chemical composition, to the mechanical mixture prepared in Example 1(f), is obtained.

The mixed dye is converted to a dye formulation by conventional methods, and the formulation is used to dye polyesters. The dyeing results achieved are the same as in Example 1(f).

EXAMPLE 3

A polyester fabric is dyed with a mixture of 50 parts of the dye of Example 1(c), 20 parts of the dye of the formula ##STR25## and 30 parts of the dye of the formula ##STR26## Deep, level, very fast navy dyeings are obtained. The mixture exhibits good build-up even when used for navy hues.

Temperature fluctuations or pH fluctuations in the dyebath during the HT process have little influence on the hue and depth of color.

EXAMPLE 4

217.5 parts of 6-chloro-2,4-dinitro-aniline are diazotized similarly to Example 1(a) and coupled, similarly to Example 1(b), with a mixture of 136.5 parts of 2-(N-allyl-N-β-cyanoethyl-amino)-4-acetanisidine, 112.2 parts of 2-(3'-phenoxy-2'-hydroxy-propylamino)-4-acetanisidine and 42.9 parts of 2-(3'-methoxy-2'-hydroxypropyl-amino)-4-acetanisidine.

475 parts of a dark dye powder are obtained; the product gives navy dyeings, which are very lightfast, washfast and fast to perspiration and thermofixing, on polyester fibers. The dye mixture has good tinctorial properties, in particular good build-up and little temperature-dependence of dye uptake in the range from 125° to 135° C.

The dye mixtures listed in the Table which follows are obtained similarly to Examples 1 to 4 and show similar tinctorial properties.

    __________________________________________________________________________     Ex-                                           Product prepared                 ample                                                                              %     X R.sup.1                                                                           R.sup.2                                                                             R                         similarly to                     __________________________________________________________________________                                                   Example                          5   20    Cl                                                                               CH.sub.3                                                                          CH.sub.3                                                                             ##STR27##                  2                                  50    " "  "    NHCH.sub.2 CH.sub.2 CN      (mixed coupling)                   30    " "  "                                                                                    ##STR28##                                                 6   (Mole %)                                                                        25 25                                                                                Cl Br                                                                            CH.sub.3 "                                                                        CH.sub.3 "                                                                          ##STR29##                                                      17 17                                                                                Cl Br                                                                            " "                                                                               " "                                                                                 ##STR30##                  2                                    8 8  Cl Br                                                                            " "                                                                               " "                                                                                 ##STR31##                                                 7   (% by                                                                          weight)                                                                        20    Cl                                                                               CH.sub.3                                                                          CH.sub.3                                                                             ##STR32##                                                     45    " "  "    NHCH.sub.2 CH.sub.2 CN      mixed coupling (3                                                              components)                        25    " "  "                                                                                    ##STR33##                                                     10    Br                                                                               "  "    N(C.sub.2 H.sub.5).sub.2    4th component admixed                                                          mechanically                   8   35    Cl                                                                               CH.sub.3                                                                          CH.sub.3                                                                             ##STR34##                                                     20    " "  "    NHCH.sub. CH.sub.2 CN       7                                  25    " "  "                                                                                    ##STR35##                                                     20    Br                                                                               "  "    N(C.sub.2 H.sub.5).sub.2                                   9   60    Br                                                                               CH.sub.3                                                                          CH.sub.3                                                                             ##STR36##                                                     10    " "  "    NHCH.sub.2 CH.sub.2 CN                                         20    " "  "                                                                                    ##STR37##                  7                                  10    Cl                                                                               C.sub.2 H.sub.5                                                                   CH.sub.3                                                                            N(C.sub.2 H.sub.5).sub.2                                   10  50    Br                                                                               CH.sub.3                                                                          CH.sub.3                                                                             ##STR38##                                                     20    " "  "    NHCH.sub.2 CH.sub.2 CN      2                                  25    " "  "                                                                                    ##STR39##                                                      5    " "  "    N(CH.sub.2CHCH.sub.2).sub.2                                11  70    Br                                                                               CH.sub.3                                                                          CH.sub.3                                                                             ##STR40##                                                     10    " "  "    NHCH.sub.2 CH.sub.2 CN      2                                  15    " "  "                                                                                    ##STR41##                                                      5    " "  "    N(C.sub.4 H.sub.9).sub.2                                   12  30    Br                                                                               C.sub.2 H.sub.5                                                                   CH.sub.3                                                                             ##STR42##                                                     40    Cl                                                                               CH.sub.3                                                                          "    NHCH.sub.2 CH.sub.2 CN      1                                  20    " "  "                                                                                    ##STR43##                                                     10    " C.sub.2 H.sub.5                                                                   "    N(C.sub.4 H.sub.9).sub.2                                   13  50    Br                                                                               CH.sub.3                                                                          CH.sub.3                                                                             ##STR44##                                                     20    " "  "    NHCH.sub.2 CH.sub.2 CN      1                                  20    Cl                                                                               "  "                                                                                    ##STR45##                                                     10    Br                                                                               "  C.sub.2 H.sub.5                                                                     N(CH.sub.3).sub.2                                          14  35    Br                                                                               CH.sub.3                                                                          CH.sub.3                                                                             ##STR46##                                                      5    Br                                                                               "  "    NHCH.sub.2 CH.sub.2 CN      2                                  40    " "  "                                                                                    ##STR47##                                                     20    " "  "                                                                                    ##STR48##                                                 15  20    Cl                                                                               CH.sub.3                                                                          CH.sub.3                                                                             ##STR49##                                                     20    " "  "    NHCH.sub.2 CH.sub.2 CN      2                                  40    " "  "                                                                                    ##STR50##                                                     20    " "  "                                                                                    ##STR51##                                                 16  50    Cl                                                                               CH.sub.3                                                                          CH.sub.3                                                                             ##STR52##                                                     25    " "  "                                                                                    ##STR53##                  2                                  25    " "  "                                                                                    ##STR54##                                                 17  60    Cl                                                                               CH.sub.3                                                                          CH.sub.3                                                                             ##STR55##                                                     10    Cl                                                                               "  "    NHCH.sub.2 CH.sub.2 CN      1                                  30    Br                                                                               C.sub.2 H.sub.5                                                                   "                                                                                    ##STR56##                                                 18  70    Br                                                                               CH.sub.3                                                                          CH.sub.3                                                                             ##STR57##                                                     10    " "  "    NHCH.sub.2 CH.sub.2 CN      1                                  20    Cl                                                                               C.sub.2 H.sub.5                                                                   "                                                                                    ##STR58##                                                 19  20    Cl                                                                               CH.sub.3                                                                          CH.sub. 3                                                                            ##STR59##                                                     50    " "  "    NHCH.sub.2 CH.sub.2 CN      2                                  30    " "  "                                                                                    ##STR60##                                                 20  15    Cl                                                                               CH.sub.3                                                                          CH.sub.3                                                                             ##STR61##                                                     50    Br                                                                               "  "                                                                                    ##STR62##                                                      5    " "  "    NHCH.sub.2 CH.sub.2 CN      1                                  25    Cl                                                                               "  "                                                                                    ##STR63##                                                      5    Br                                                                               "  "    N(C.sub.2 H.sub.5).sub.2                                   21  60    Br                                                                               CH.sub.3                                                                          H                                                                                    ##STR64##                                                     10    " "  "    NHCH.sub.2 CH.sub.2 CN      2                                  30    " "  CH.sub. 3                                                                            ##STR65##                                                 22  20    Cl                                                                               CH.sub.3                                                                          CH.sub.3                                                                             ##STR66##                                                     50    " "  "    NHCH.sub.2 CH.sub.2 CN      2                                  30    " "  H                                                                                    ##STR67##                                                 23  30    Br                                                                               C.sub.2 H.sub.5                                                                   CH.sub.3                                                                             ##STR68##                                                     45    " "  "    NHCH.sub.2 CH.sub.2 CN      2                                  25    " CH.sub.3                                                                          "                                                                                    ##STR69##                                                 24  45    Br                                                                               CH.sub.3                                                                          CH.sub.3                                                                             ##STR70##                                                     30    " "  "    NHCH.sub.2 CH.sub.2 CN      1                                  25    Cl                                                                               C.sub.2 H.sub.5                                                                   "                                                                                    ##STR71##                                                 25  55    Cl                                                                               CH.sub.3                                                                          CH.sub.3                                                                             ##STR72##                                                     10    " "  "                                                                                    ##STR73##                  7                                  10    " "  "    NHCH.sub.2 CH.sub.2 CN                                         25    Br                                                                               "  "                                                                                    ##STR74##                                                 26  45    Br                                                                               CH.sub.3                                                                          CH.sub.3                                                                             ##STR75##                                                     15    " "  "    NHCH.sub.2 CH.sub.2 CN      2                                  20    " "  "                                                                                    ##STR76##                                                     20    " "  "                                                                                    ##STR77##                                                 __________________________________________________________________________ 

We claim:
 1. A navy dye mixture, containing dyes of the formula I ##STR78## where X is hydrogen, chlorine or bromine,R¹ is hydrogen, methoxy, ethoxy or phenoxy, R² is hydrogen, methyl, ethyl, n-propyl or i-propyl and R is ##STR79## where R³ is C₁ -C₅ -alkyl, allyl, methallyl, crotonyl, prenyl or benzyl, R⁴ is unsubstituted or phenyl- or phenoxy-substituted straight-chain or branched C₁ -C₈ -alkyl which may be interrupted by 1, 2 or 3 O atoms, or is C₃ -C₅ -alkenyl, unsubstituted or chlorine-, bromine-, C₁ -C₄ -alkyl- or C₁ -C₄ -alkoxy-substituted phenyl or benzyl,the mixture containing not less than 40% of dyes wherein R is ##STR80## or NHC₂ H₄ CN, from 0 to 20% of one or more dyes wherein R is ##STR81## and from 10 to 60% of one or more dyes wherein R is ##STR82##
 2. The navy dye mixture of claim 1, wherein said mixture contains 20 parts of the dye of the formula ##STR83## 40parts of the dye of the formula ##STR84## 10parts of the dye of the formula ##STR85## and 30 parts of the dye of the formula ##STR86##
 3. The dye mixture of claim 1 wherein said mixture contains 50 parts of the dye of the formula ##STR87## 20parts of the dye of the formula ##STR88## and 30 parts of the dye of the formula ##STR89## 